libcxx/test/support/propagate_const_helpers.h

   1  // A lightweight class, with pointer-like methods, that contains an int
   2 struct X
   3 {
   4     int i_;
   5
   6     constexpr const int &operator*() const { return i_; }
   7     constexpr int &operator*() { return i_; }
   8     constexpr const int *get() const { return &i_; }
   9     constexpr int *get() { return &i_; }
  10     constexpr const int *operator->() const { return &i_; }
  11     constexpr int *operator->() { return &i_; }
  12
  13     constexpr X(int i) : i_(i) {}
  14 };
  15
  16 struct XWithImplicitIntStarConversion
  17 {
  18     int i_;
  19
  20     constexpr const int &operator*() const { return i_; }
  21     constexpr int &operator*() { return i_; }
  22     constexpr const int *get() const { return &i_; }
  23     constexpr int *get() { return &i_; }
  24     constexpr const int *operator->() const { return &i_; }
  25     constexpr int *operator->() { return &i_; }
  26     constexpr operator int* () { return &i_; }
  27
  28     constexpr XWithImplicitIntStarConversion(int i) : i_(i) {}
  29 };
  30
  31 struct XWithImplicitConstIntStarConversion
  32 {
  33     int i_;
  34
  35     constexpr const int &operator*() const { return i_; }
  36     constexpr int &operator*() { return i_; }
  37     constexpr const int *get() const { return &i_; }
  38     constexpr int *get() { return &i_; }
  39     constexpr const int *operator->() const { return &i_; }
  40     constexpr int *operator->() { return &i_; }
  41     constexpr operator const int* () const { return &i_; }
  42
  43     constexpr XWithImplicitConstIntStarConversion(int i) : i_(i) {}
  44 };
  45
  46 struct ExplicitX
  47 {
  48     int i_;
  49
  50     constexpr const int &operator*() const { return i_; }
  51     constexpr int &operator*() { return i_; }
  52     constexpr const int *get() const { return &i_; }
  53     constexpr int *get() { return &i_; }
  54     constexpr const int *operator->() const { return &i_; }
  55     constexpr int *operator->() { return &i_; }
  56
  57     constexpr explicit ExplicitX(int i) : i_(i) {}
  58 };
  59
  60 struct MoveConstructibleFromX
  61 {
  62     int i_;
  63
  64     constexpr const int &operator*() const { return i_; }
  65     constexpr int &operator*() { return i_; }
  66     constexpr const int *get() const { return &i_; }
  67     constexpr int *get() { return &i_; }
  68     constexpr const int *operator->() const { return &i_; }
  69     constexpr int *operator->() { return &i_; }
  70
  71     constexpr MoveConstructibleFromX(int i) : i_(i) {}
  72     constexpr MoveConstructibleFromX(X&& x) : i_(x.i_) {}
  73 };
  74
  75 struct ExplicitMoveConstructibleFromX
  76 {
  77     int i_;
  78
  79     constexpr const int &operator*() const { return i_; }
  80     constexpr int &operator*() { return i_; }
  81     constexpr const int *get() const { return &i_; }
  82     constexpr int *get() { return &i_; }
  83     constexpr const int *operator->() const { return &i_; }
  84     constexpr int *operator->() { return &i_; }
  85
  86     constexpr ExplicitMoveConstructibleFromX(int i) : i_(i) {}
  87     constexpr explicit ExplicitMoveConstructibleFromX(X&& x) : i_(x.i_) {}
  88 };
  89
  90 struct CopyConstructibleFromX
  91 {
  92     int i_;
  93
  94     constexpr const int &operator*() const { return i_; }
  95     constexpr int &operator*() { return i_; }
  96     constexpr const int *get() const { return &i_; }
  97     constexpr int *get() { return &i_; }
  98     constexpr const int *operator->() const { return &i_; }
  99     constexpr int *operator->() { return &i_; }
 100
 101     constexpr CopyConstructibleFromX(int i) : i_(i) {}
 102     constexpr CopyConstructibleFromX(const X& x) : i_(x.i_) {}
 103 };
 104
 105 struct ExplicitCopyConstructibleFromX
 106 {
 107     int i_;
 108
 109     constexpr const int &operator*() const { return i_; }
 110     constexpr int &operator*() { return i_; }
 111     constexpr const int *get() const { return &i_; }
 112     constexpr int *get() { return &i_; }
 113     constexpr const int *operator->() const { return &i_; }
 114     constexpr int *operator->() { return &i_; }
 115
 116     constexpr ExplicitCopyConstructibleFromX(int i) : i_(i) {}
 117     constexpr explicit ExplicitCopyConstructibleFromX(const X& x) : i_(x.i_) {}
 118 };